Re: RE [Xen-users] Re: xen-3.0.4 networking problem after migration

[Weikuan Yu <weikuan.yu@xxxxxxxxx>]

Alain BARTHE wrote:
> xen-users-bounces@xxxxxxxxxxxxxxxxxxx a écrit sur 19/02/2008 06:30:54 :
>
>  > I reply to my post earlier. It was a problem on the configuration file.
>  > It appears that, when not using dhcp, live migration with static mac
>  > address would cause a problem to IP in migrated domU.
>
> We are also using xen 3.0.x, we are not using DHCP, we have static MAC 
> address in our domU, and we never encountered such a problem in live 
> migrations.
> Maybe another explanation ?
Here is the line that caused trouble to domU.
# vif = [ 'mac=aa:00:00:00:b3:01, bridge=xenbr0' ]
compared to the following that works.
# vif = ['']

It could be due to 'bridge=xenbr0' then.

--Weikuan

>  >
>  > --Weikuan
>  >
>  > Weikuan Yu wrote:
>  > > Hello,
>  > >
>  > > I am facing an networking problem for xen migration. I used to have it
>  > > working fine. But as I worked with several trees, I lost track on the
>  > > correct configuration I should have.
>  > >
>  > > The problem is as this, with xen-3.0.4 on CentOS-4.4. I can install 
> xen,
>  > > start xend, and create domU, all fine.
>  > > # xend start (on both nodes)
>  > > # ssh node02 xend start
>  > >
>  > > Then create a domU on node01
>  > > # xm create -c cvm.01
>  > >
>  > > At this point, I can ping this domU from many different nodes in the
>  > > subnet. Then, I migrate it to node02
>  > > # xm migrate cvm.01 -l node02
>  > >
>  > > Right after the migration, I can no long ping the domU. This domU now
>  > > can only be ping'ed from the new host, node02. Interestingly, if I
>  > > migrate the same domU back to node01. Pinging works fine again from 
> many
>  > > different nodes.
>  > >
>  > > Anybody has seen this before? I know xen-3.0.4 is old by now. But want
>  > > to avoid a new installation if possible.
>  > >
>  > > Can somebody offer a hint? Any help is appreciated.
>  > >
>  > > -- Weikuan
>  > >
>  >
>  >
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>  > Xen-users@xxxxxxxxxxxxxxxxxxx
>  > http://lists.xensource.com/xen-users
--
Weikuan Yu <+> 1-865-574-7990
http://ft.ornl.gov/~wyu/

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